president obama and mitt romney squared off for 90 minutes last night in denver. tracy potts is live in denver now with the latest on the debate. >> reporter: good morning, everyone, from denver, where the pressure was on for mitt romney to perform to back up his ideas with details, taking on the man that even some republicans had described as one of the most skilled debaters in modern politics. the point of this debate was to make differences clear, on lowering the desmt. >> you said you'd cut the deficit in half, it's now four years later, we have trillion-dollar deficits. >> the way we do it is for every $2.50 of additional debt, we ask for a dollar, paid for by those doing very well to contribute a little more to reduce the deficit. >> reporter: the president insisted romney would spend five trillion on tax breaks favoring the wealthy. >> math, common sense, and our history shows us that's not a recipe for job growth. >> everything he just said about my tax plan is inaccurate. >> they clashed on wall street, whether banks should be too big to fail, and medicar